car not starting

[geesus69]

right in my never ending quest to get my hybrid runnning its time to put your ideas forward, heres what i know.......

originally had this problem from the start, not getting voltage to the coil pack, basically the fuel pump relay (that also controls the coil feed) doesnt click in under cranking. i get it momentarily on ignition as it primes the fuel lines, then the relay clicks out again, then under cranking it doesnt click back in.

a few weeks back i managed to get it running, didnt really do anything different to it to what i've already been doing, just all of a sudden i had voltage at the coil under cranking and it fired into life. then i tried to tidy the wiring up coming out of the relay and ever since then ive had the same problem again, no voltage at the coil

i can bypass the relay all together and get a constant feed from the battery so that the fuel pump runs and the coil has voltage, but again it still doesnt fire up.

i am now thinking that because the ecu isnt signalling the relay to close it wont then trigger spark or injectors. the fuel pump relay control is a thin orange wire coming out of the ecu, is there any way i can fool it into triggering? is this possibly an immobiliser issue? why would it all of a sudden decide to work? the ecu is fitted with an emulator and has been tested a while back on another car. could it be my bodged wiring coming out of the relay that is causing this somehow?

any help at all is appreciated

 

[Jay Payne]

Right, let me have a go.......

The fuel pump will run on ignition on for a few seconds. The ecu will then trigger the fuel pump relay on cranking, ONLY, if it see's a cranking signal from the cps. Best way to check this is as i said before with a noid light.

You would fit this into an injector multi plug (disconnected) and crank. If the led flashes, the injector is being switched and the cps is sending a signal to the ecu, it is reading it and sending a signal to the injection system. Eliminating a s**t load of possibilities in one go.

To check the cps sensor you need a multi meter set to AC volts not DC! You will get around 0.5 AC volts on cranking at the sensor. tricky to check but if u have another loom or cps connector then you can check it there. Alternativley check it at the ecu end if u know the pin numbers for the input.


Wish i was closer mate, id pop round to help